Event: Division 4

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Opponent Rating Result
Martin J Wallman 1766 ½ - ½
Sergiu Bivol 1791 0 - 1
Michael J Gunn 1560 1 - 0
Scott Leadbetter 1702 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1805 = (6819 + 400 * (2 - 1)) / 4)

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